干旱区生态环境知识资源中心(Arid): Aerosol variability induced by atmospheric dynamics in a coastal area of Senegal, North-Western Africa

Arid

DOI	10.1016/j.atmosenv.2019.01.041
	Aerosol variability induced by atmospheric dynamics in a coastal area of Senegal, North-Western Africa
	Crumeyrolle, Suzanne 1; Augustin, Patrick 2; Rivellini, Laura-Helena 1,3; Choel, Marie 4; Riffault, Veronique 3; Deboudt, Karine 2; Fourmentin, Marc 2; Dieudonne, Elsa 2; Delbarre, Herve 2; Derimian, Yevgeny 1; Chiapello, Isabelle 1
通讯作者	Crumeyrolle, Suzanne
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2019
卷号	203 页码:228-241
英文摘要	During the first Intensive Observation Period (IOP1) of the SHADOW (SaHAran Dust Over West Africa) campaign carried out during March-June 2015, the Mbour site (Senegal) was reinforced with a large setup of in-situ and remote sensing instruments to measure the aerosol optical, physical and chemical properties as well as the atmospheric dynamical features over the site. Here, we use this dataset to study the impact of Sea Breeze (SB) on the aerosol properties. Two case studies were selected: (i) one representative of SB events observed during typical Harmattan conditions, (ii) and one representative of SB events observed during a Harmattan desert dust event. Both cases show a strong influence of the SB period on the dry Mass Scattering Efficiency (MSE), which increases by a factor of up to 1.4. Given the fact that SB occurred every other day at this coastal site during IOP1 (dry season) and that the relative humidity may reach 96%, the effect of such event on the radiative forcing may not be negligible. In order to evaluate the effects of different flows on aerosol transport, recirculation and stagnation factors were retrieved from wind components. The air mass recirculation factor implies that aerosols previously transported from the land over the sea are then brought back inland. In both cases, high recirculation factors were calculated (between 0.84 and 0.98) and air mass stagnation was observed right before the SB establishment. However, this stagnation is observed over the sea during the first case while it is located near the coast during the second case, which has a significant impact on the aerosol evolution. Indeed, a stagnation of air masses over the sea is associated with an increase in fine aerosol mass concentrations (PM1, PM2.5) due to a higher contribution of marine and anthropogenic sources notably for organic aerosols, and a higher contribution of more-oxidized organics. This contribution is lower when the air mass stagnation occurs over the shoreline during the desert dust event.
英文关键词	Aerosol Sea breeze Dynamics Pollution In-situ and remote Sensing measurements
类型	Article
语种	英语
国家	France
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000462109500023
WOS关键词	LOW-LEVEL JET ; MINERAL DUST CONCENTRATIONS ; AFFECTING AIR-POLLUTANTS ; ROAD TRAFFIC EMISSIONS ; SEA-BREEZE FRONT ; BOUNDARY-LAYER ; SOURCE APPORTIONMENT ; PARTICLE FORMATION ; INTEGRAL MEASURES ; BLACK CARBON
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214495
作者单位	1.Univ Lille, CNRS, UMR 8518, LOA, F-59000 Lille, France; 2.Univ Littoral Cote dOpale, EA 4493, LPCA, F-59140 Dunkerque, France; 3.Univ Lille, IMT Lille Douai, SAGE, Dept Sci Atmosphere & Genie Environm, F-59000 Lille, France; 4.Univ Lille, CNRS, UMR 8516, LASIR Lab Spectrochim Infrarouge & Raman, F-59000 Lille, France
推荐引用方式 GB/T 7714	Crumeyrolle, Suzanne,Augustin, Patrick,Rivellini, Laura-Helena,et al. Aerosol variability induced by atmospheric dynamics in a coastal area of Senegal, North-Western Africa[J],2019,203:228-241.
APA	Crumeyrolle, Suzanne.,Augustin, Patrick.,Rivellini, Laura-Helena.,Choel, Marie.,Riffault, Veronique.,...&Chiapello, Isabelle.(2019).Aerosol variability induced by atmospheric dynamics in a coastal area of Senegal, North-Western Africa.ATMOSPHERIC ENVIRONMENT,203,228-241.
MLA	Crumeyrolle, Suzanne,et al."Aerosol variability induced by atmospheric dynamics in a coastal area of Senegal, North-Western Africa".ATMOSPHERIC ENVIRONMENT 203(2019):228-241.